CN115246208A

CN115246208A - Locking mechanism for die assembly of blow molding machine

Info

Publication number: CN115246208A
Application number: CN202111664410.2A
Authority: CN
Inventors: 王影星; 尤明亮; 尤国祥; 李元源; 靖文
Original assignee: Yancheng Institute of Industry Technology
Current assignee: Yancheng Institute of Industry Technology
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-10-28

Abstract

The invention belongs to the technical field of mold closing and locking mechanisms of blow molding machines, and particularly relates to a locking mechanism for mold closing of a blow molding machine, which comprises a hydraulic oil cylinder, a motor, a telescopic rod, a bent rod, a fixed rod, a supporting plate and a connecting piece, wherein the hydraulic oil cylinder is connected with the motor; when the backup pad removes to the hydraulic cylinder outside along with the telescopic link, the arc motion of slant is made to the bottom of keeping away from hydraulic cylinder one end removal in-process knee at the top of knee, the arc motion in-process of slant is made to the bottom of knee drives the locating plate through using the connecting piece to remove along the horizontal direction in making the slant, make the telescopic link drive backup pad force knee bottom promote the locating plate and remove with the template, the mould on the symmetrical design locating plate surface is fully laminated when stretching out completely until the telescopic link, cooperation through hydraulic cylinder and telescopic link, thrust when can effectively improve the outside extension of telescopic link, the principle of make full use of lever forces the locating plate mould on the surface fully to laminate, thereby can effectively strengthen the clamp force of mould when the compound die.

Description

Locking mechanism for die assembly of blow molding machine

Technical Field

The invention belongs to the technical field of mold closing and locking mechanisms of blow molding machines, and particularly relates to a locking mechanism for mold closing of a blow molding machine.

Background

A blow molding machine is a plastic processing machine. After the liquid plastic is ejected, the plastic is blown into a shaped cavity by the force of the wind blowing out of the machine, which is called a blow molding machine, to produce the product. The plastic is melted and extruded quantitatively in a screw extruder, then is formed through a mouth film, is blown by an air ring for cooling, is pulled at a certain speed by a tractor, and is wound into a roll by a winding machine.

The locking mechanism is an important component of the blow molding machine, most of the locking mechanisms of the blow molding machine in the prior art adopt a motor to drive or a hydraulic push rod to drive the mold to be closed, so that the clamping force of the mold during closing is further improved, but the force output by the motor or the hydraulic push rod is determined according to the models of the motor and the hydraulic push rod, when the mold needs a large enough clamping force in the closing process, large power output equipment needs to be equipped synchronously, and the corresponding cost of the large power output equipment is increased accordingly.

In view of this, a small-sized power output apparatus is required, which is a locking mechanism for increasing the clamping force of the molds against each other in the mold clamping process.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problem that the clamping force between the dies is weak in the die closing process on the premise of the same power output equipment, the invention provides a locking mechanism for die closing of a blow molding machine.

The technical scheme adopted by the invention for solving the technical problems is as follows: the locking mechanism for die assembly of the blow molding machine comprises a hydraulic oil cylinder and a positioning plate, wherein the positioning plate is designed in a symmetrical structure and is positioned below the hydraulic oil cylinder;

the locking mechanism further comprises: the supporting plate is fixedly connected with one end, far away from the hydraulic oil cylinder, of the telescopic rod, and a rectangular hole is formed in the middle of the supporting plate;

the bending rods are designed in a '<' -shaped structure, one ends of the bending rods are slidably mounted in the rectangular holes, round holes are formed in the middle of the bending rods, two groups of the bending rods are symmetrically distributed on two sides of the positioning plate, two bending rods are distributed in parallel in each group, the same group of the bending rods are located on the same side of the mold, a fixing rod is rotatably connected between the bending rods in each group through the round holes, the middle of the fixing rod is fixedly connected to a first supporting rod, and one end, far away from the fixing rod, of the first supporting rod is fixedly connected with the hydraulic oil cylinder;

the other end of the bent rod is connected with the positioning plate through the connecting piece, and the connecting piece is used for assisting the bent rod to force the positioning plate to move along the horizontal direction.

Preferably, the connector comprises: the sliding groove is formed in the surface, close to one end of the bent rod, of the positioning plate;

the sliding block is connected inside the sliding groove in a sliding mode, and one end, protruding out of the sliding groove, of the sliding block is hinged to the bottom end of the bent rod;

the track is located at the bottom of the positioning plate, a second supporting rod is fixedly connected between the track and the fixing rod, the positioning plate and the mold slide on the surface of the track, and the track is used for assisting the positioning plate and the mold to move in the horizontal direction.

Preferably, the surface of one end, close to the sliding groove, of the sliding block is rotatably connected with uniformly arranged balls.

Preferably, a first balancing weight is installed at the top of the bent rod and used for enhancing the clamping force of the positioning plate after the positioning plate is clamped.

Preferably, the first balancing weight is of a hollow design, and the top of the bent rod is slidably connected inside the first balancing weight.

Preferably, the surface of one side of the bent rod, which is far away from the positioning plate, is connected with a counterweight mechanism in a sliding manner, and the counterweight mechanism is used for enhancing the clamping force of the positioning plate during mold closing.

Preferably, the weight mechanism includes: the arc-shaped groove is formed in the surface of one side, far away from the positioning plate, of the bent rod;

the second balancing weight is connected inside the arc-shaped groove in a sliding mode, a pull rope is fixedly connected to the surface of the top end of the second balancing weight, and one end, far away from the second balancing weight, of the pull rope is fixedly connected with the first balancing weight.

Preferably, the surface of the second balancing weight, which is in contact with the arc-shaped groove, is coated with a PTFE coating.

Preferably, the knee is close to the fixed surface on one side of the telescopic rod is connected with a reinforcing plate, the reinforcing plate is used for reinforcing the strength of the knee, the two ends of the reinforcing plate are respectively fixedly connected with the two sides of the knee, and the middle part of the reinforcing plate is not in contact with the knee.

Preferably, a rubber layer is fixedly connected between the positioning plate and the mold, and a bolt on the surface of the positioning plate penetrates through the rubber layer to be fixedly connected with the mold.

The invention has the following beneficial effects:

1. the locking mechanism for die assembly of the blow molding machine is characterized in that a hydraulic oil cylinder, a motor, a telescopic rod, a bent rod, a fixed rod, a supporting plate and a connecting piece are arranged; when the backup pad removed to the hydraulic cylinder outside along with the telescopic link, the arc motion of making the slant to the bottom of keeping away from hydraulic cylinder one end removal in-process knee at the top of knee, the arc motion in-process of making the slant is moved to the bottom of knee drives the locating plate along the horizontal direction removal through using the connecting piece, extend to the hydraulic cylinder outside along with the telescopic link lasts, make the telescopic link drive the backup pad and force the knee bottom to promote the locating plate and remove with the template, mould on the symmetrical design locating plate surface fully laminates when stretching out completely until the telescopic link, through the cooperation of hydraulic cylinder with the telescopic link, can effectively improve the thrust when the telescopic link outwards extends, the thrust of rethread telescopic link promotes the knee top, the principle of make full use of lever forces the locating plate mould on the surface fully to laminate, thereby can effectively strengthen the clamp force of mould when the compound die.

2. The locking mechanism for die assembly of the blow molding machine is provided with a positioning plate, a die, a supporting plate telescopic rod and a first balancing weight; when the telescopic link outwards extended and driven the backup pad and force the curved bar bottom to drive the mould laminating on locating plate surface, the curved bar was the tilt state this moment, through installing first balancing weight at the top of curved bar, utilized lever principle, curved bar top weight increase, led to the bottom of curved bar to drive the synchronous increase of power that locating plate and mould removed to clamp force when can further improving the mould compound die, improve product blow molding effect in step.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

in the figure: the device comprises a hydraulic oil cylinder 1, a motor 11, an expansion link 12, a support plate 13, a rectangular hole 131, a bent rod 2, a first balancing weight 21, a pull rope 22, a second balancing weight 23, a fixed rod 24, a first support rod 25, a reinforcing plate 26, an arc-shaped groove 27, a track 3, a positioning plate 31, a sliding groove 311, a sliding block 312, a ball 313, a rubber layer 32, a mold 33 and a second support rod 34.

Detailed Description

In order to make the objects, technical means and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

The embodiment of the invention provides a locking mechanism for die assembly of a blow molding machine, which solves the technical problem that the molding effect of a blow molding product is influenced by weak clamping force between dies in the die assembly process of the locking mechanism of the blow molding machine die under the premise of the prior art with the same power output equipment.

The embodiment of the invention provides a locking mechanism for die assembly of a blow molding machine, which solves the problems and has the following general idea: by designing the connecting position of the fixing rod 24 on the bent rod 2, the fixing rod 24 and the first supporting rod 25 form a lever structure, a motor is used for driving a bidirectional gear pump in a hydraulic oil cylinder to rotate to drive a telescopic rod to force the top of the bent rod to move towards one end far away from the hydraulic oil cylinder, the arm of force of one end, close to the positioning plate 31, of the bent rod 2 is smaller than that of one end, close to the supporting plate 13, of the bent rod, the output acting force is amplified by utilizing the lever principle, in the mold closing process, the acting force of one end, close to the positioning plate 31, of the bent rod 2 on the positioning plate 31 is larger than that of one end, close to the supporting plate 13, of the bent rod 2, so that the lever principle is fully utilized, the mold 33 on the surface of the positioning plate 31 is forced to be fully attached, and the clamping force of the mold 33 in mold closing can be effectively enhanced on the premise of the same power output equipment.

In order to better understand the technical solution, the technical solution is described in detail below with reference to the drawings and the specific embodiments.

As shown in fig. 1 to 3, the locking mechanism for die assembly of the blow molding machine comprises a hydraulic oil cylinder 1 and a positioning plate 31, wherein the positioning plate 31 is designed in a symmetrical structure and is positioned below the hydraulic oil cylinder 1, a die 33 is fixedly mounted on the positioning plate 31 through a bolt, a bidirectional gear pump is mounted inside the hydraulic oil cylinder 1, a motor 11 is mounted above the hydraulic oil cylinder 1, the side walls of the left end and the right end of the hydraulic oil cylinder 1 are hermetically and slidably connected with uniformly arranged telescopic rods 12, and the motor 11 is used for driving the bidirectional gear pump inside the hydraulic oil cylinder 1 to rotate so as to force the hydraulic oil inside the hydraulic oil cylinder 1 to drive the telescopic rods 12 to stretch;

the locking mechanism further comprises: the supporting plate 13 is fixedly connected with one end, far away from the hydraulic oil cylinder 1, of the telescopic rod 12, and a rectangular hole 131 is formed in the middle of the supporting plate 13;

the bending rods 2 are designed in a cross-shaped structure, one ends of the bending rods 2 are slidably mounted in the rectangular holes 131, a round hole is formed in the middle of each bending rod 2, two groups of the bending rods 2 are symmetrically distributed on two sides of the positioning plate 31, two bending rods 2 in each group are distributed in parallel, the same group of the bending rods 2 are positioned on the same side of the mold 33, a fixing rod 24 is rotatably connected between the bending rods 2 in each group through the round hole, the middle of the fixing rod 24 is fixedly connected to a first supporting rod 25, and one end, away from the fixing rod 24, of the first supporting rod 25 is fixedly connected with the hydraulic oil cylinder 1;

the other end of the bent rod 2 is connected with the positioning plate 31 through a connecting piece, and the connecting piece is used for assisting the bent rod 2 to force the positioning plate 31 to move along the horizontal direction;

during operation, as shown in fig. 1, a motor 11 is installed above a hydraulic oil cylinder 1, a bidirectional gear pump is installed inside the hydraulic oil cylinder 1, the hydraulic oil cylinder 1 is installed on a bracket of a blow molding machine, telescopic rods 12 are connected to side walls of the left end and the right end of the hydraulic oil cylinder 1 in a sealing and sliding manner, the motor 11 is started, so that the motor 11 synchronously drives the bidirectional gear pump inside the hydraulic oil cylinder 1 to rotate, the bidirectional gear pump drives hydraulic oil inside the hydraulic oil cylinder 1 to drive the telescopic rods 12 to extend towards one end far away from the hydraulic oil cylinder 1 in the rotating process, the telescopic rods 12 are forced to move towards the outside of the hydraulic oil cylinder 1 (refer to the working principle of an electric hydraulic push rod), a support plate 13 is fixedly connected to one end of the telescopic rods 12 far away from the hydraulic oil cylinder 1, the support plate 13 is synchronously driven to move in the moving process towards the outside of the hydraulic oil cylinder 1, a rectangular hole 131 is formed in the middle part of the support plate 13, one end of the bent rod 2 is slidably mounted in the rectangular hole 131, the other end of the bent rod 2 is connected with the positioning plate 31 below the hydraulic oil cylinder 1 by using a connecting piece, when the telescopic rod 12 drives the supporting plate 13 to move towards one end far away from the hydraulic oil cylinder 1, the supporting plate 13 is contacted with the bent rod 2 in the rectangular hole 131 and drives the top of the bent rod 2 to move towards one end far away from the hydraulic oil cylinder 1, because the fixed rod 24 is rotatably connected between each group of the bent rods 2, the middle part of the fixed rod 24 is fixedly connected with the first supporting rod 25, one end far away from the fixed rod 24 through the first supporting rod 25 is fixedly connected with the hydraulic oil cylinder 1, the distance between the fixed rod 24 and the hydraulic oil cylinder 1 is not changed, the top of the bent rod 2 makes an oblique upward arc motion towards the bottom of the bent rod 2 in the process of moving towards one end far away from the hydraulic oil cylinder 1, namely, the bent rod 2, the fixed rod 24 and the first supporting rod 25 form a lever structure and start to move, the bottom of the bent rod 2 is connected with the positioning plate 31 through a connecting piece, the positioning plate 31 is driven to move along the horizontal direction by using the connecting piece in the process of making the bottom of the bent rod 2 do oblique upward arc motion, a mold 33 is fixedly installed on the surface of one end, far away from the bent rod 2, of the positioning plate 31 through a bolt, the positioning plate 31 synchronously drives the mold 33 to move in the moving process, the positioning plate 31 is in a symmetrical structure design through the positioning plate 31, the telescopic rod 12 continuously extends towards one end, far away from the hydraulic oil cylinder 1, the telescopic rod 12 drives the supporting plate 13 to force the bottom of the bent rod 2 to push the positioning plate 31 and the mold 33 to move along the horizontal direction, until the telescopic rod 12 completely extends out, the two symmetrically designed positioning plates 31 are fully attached to the mold 33 on the surface, meanwhile, through designing the connecting position of the fixing rod 24 on the bent rod 2, the lever structure formed by the fixing rod 24 and the first supporting rod 25, the length of the force arm, close to one end of the bent rod 2 to the positioning plate 31, is smaller than the length of the force arm close to one end of the positioning plate 31 to the supporting plate, the positioning plate is amplified by using the lever principle, and the force output of the positioning plate 31 is prevented from being fully applied to the mold 33 in the mold closing process, and the mold 33 is prevented from being applied to the mold in the blow molding process.

As an embodiment of the present invention, the connector includes: the sliding groove 311 is formed in the surface of the positioning plate 31 close to one end of the bent rod 2;

the sliding block 312 is slidably connected inside the sliding groove 311, and one end of the sliding block 312, which protrudes out of the sliding groove 311, is hinged to the bottom end of the bent rod 2;

the rail 3 is positioned at the bottom of the positioning plate 31, a second support rod 34 is fixedly connected between the rail 3 and the fixing rod 24, the positioning plate 31 and the mold 33 slide on the surface of the rail 3, and the rail 3 is used for assisting the positioning plate 31 and the mold 33 to move in the horizontal direction;

during operation, as shown in fig. 1 and fig. 2, since the surface of the positioning plate 31 near one end of the curved bar 2 is provided with the sliding slot 311, the sliding slot 311 is internally connected with the sliding block 312 in a sliding manner, and the telescopic rod 12 extends towards one end far away from the hydraulic oil cylinder 1 to drive the support plate 13 to force the top of the curved bar 2 to move synchronously, since the curved bar 2 is rotatably mounted on the fixed rod 24 and the fixed rod 24 is fixedly connected with the hydraulic oil cylinder 1 through the first support rod 25, the bottom of the curved bar 2 makes an upward oblique arc motion, and the sliding block 312 inside the sliding slot 311 is synchronously driven to move upwards along the bottom of the sliding slot 311 during the upward arc motion of the bottom of the curved bar 2 by the sliding block 312 protruding out of one end of the sliding slot 311 and being hinged with the bottom end of the curved bar 2, and since the bottom of the curved bar 2 makes an upward arc motion of the oblique direction, the positioning plate 31 is driven to move horizontally during the upward movement of the sliding block 311 inside the sliding slot 311, the positioning plate 31 synchronously drives the mold 33 on the surface of the positioning plate 31 to move in the moving process, the rails 3 are arranged at the bottoms of the positioning plate 31 and the mold 33, the positioning plate 31 and the mold 33 slide on the surfaces of the rails 3, when the bottom of the bent rod 2 moves in an upward oblique arc, the slide block 312 in the slide groove 311 is driven to move towards the top of the slide groove 311, so that the positioning plate 31 drives the mold 33 to move, the positioning plate 31 and the mold 33 can only move along the horizontal direction of the rails 3 by matching with the rails 3, the second support rod 34 is fixedly connected between the rails 3 and the fixing rod 24, so that the fixing rod 24 is further fixed by matching with the first support rod 25 through the second support rod 34, and the fixing rod 24 is prevented from being deformed by the large acting force applied to the fixing rod 24 and the first support rod 25 in the moving process of the bent rod 2, so that the fixing rod 24 is driven to displace to influence the normal use of the locking mechanism, until the telescopic rod 12 is fully extended, the sliding block 312 is located at the top of the sliding slot 311, and the molds 33 on the opposite surfaces of the two positioning plates 31 which are symmetrically designed are fully attached.

As an embodiment of the present invention, a surface of the slider 312 near one end of the sliding slot 311 is rotatably connected with uniformly arranged balls 313;

during operation, as shown in fig. 3, the uniformly arranged balls 313 are rotatably connected to the surface of one end, close to the sliding groove 311, of the sliding block 312, so that friction between the sliding block 312 and the sliding block 311 is changed from sliding friction to rolling friction, friction between the sliding groove 311 and the sliding block 312 is reduced, sliding smoothness of the sliding block 312 in the sliding groove 311 is improved, and the phenomenon that the bottom of the bent rod 2 is influenced by overlarge resistance of the sliding block 312 in the sliding groove 311 during moving is avoided.

As an embodiment of the present invention, a first counterweight 21 is installed on the top of the curved rod 2, and the first counterweight 21 is used for enhancing the clamping force of the positioning plate 31 after the mold is closed;

during operation, as shown in fig. 1, the telescopic link 12 extends to keep away from hydraulic cylinder 1 one end and drives backup pad 13 and force 2 bottoms of knee to drive two relative surperficial moulds 33 of locating plate 31 and paste, use dead lever 24 as whole lever structure's fulcrum this moment, 2 whole inclined state that are of knee, install first balancing weight 21 through the top at knee 2, the focus of first balancing weight 21 is located one side that locating plate 31 was kept away from to dead lever 24 this moment, utilize lever principle, 2 top weight increases of knee, the power synchronous increase that leads to the bottom of knee 2 to drive locating plate 31 and mould 33 to remove, thereby can further improve the clamp force when mould 33 compound die, improve the product blow molding effect in step.

As an embodiment of the present invention, the first balance weight 21 is designed to be hollow, and the top of the curved rod 2 is slidably connected inside the first balance weight 21;

during operation, as shown in fig. 2, it is designed to be hollow through being at first balancing weight 21, make 2 tops of knee-bars can sliding connection inside first balancing weight 21, when telescopic link 12 extends to keeping away from 1 one end of hydraulic cylinder and drives backup pad 13 to remove, backup pad 13 forces the knee-bar 2 to remove the in-process along with telescopic link 12 outwards extending, knee-bar 2 atress uses dead lever 24 as the pivot, wholly be the slope form, along with knee-bar 2 lasts atress and removal, make dead lever 24 on the relative knee-bar 2 of first balancing weight 21 above backup pad 13 slide along knee-bar 2 to the direction of keeping away from dead lever 24, thereby can effectively prolong the length of the arm of force that dead lever 24 kept away from locating plate 31 one end on knee-bar 2, and then utilize lever principle further to improve the power that the bottom of knee-bar 2 drove locating plate 31 and mould 33 and remove, further strengthen the clamp force when mould 33 closes the mould.

As an embodiment of the present invention, a counterweight mechanism is slidably connected to a surface of the side of the curved rod 2 away from the positioning plate 31, and the counterweight mechanism is used for enhancing a clamping force when the positioning plate 31 is clamped;

when the device works, as shown in fig. 2, a counterweight mechanism is connected to the surface of the side of the bent rod 2 far from the positioning plate 31 in a sliding manner, the counterweight mechanism crosses the position of the fixing rod 24 on the bent rod 2 and is close to the positioning plate 31 in an initial state, the support plate 13 extends to the end far from the hydraulic oil cylinder 1 along with the telescopic rod 12 to force the first counterweight block 21 at the top of the bent rod 2 to slide relative to the fixing rod 24 on the bent rod 2 along the direction far from the fixing rod 24, the first counterweight block 21 synchronously drives the counterweight mechanism to slide along the bent rod 2 to the top of the bent rod 2, when the telescopic rod 12 extends to the end far from the hydraulic oil cylinder 1 to drive the support plate 13 to force the bottom of the bent rod 2 to drive the molds 33 on the opposite surfaces of the two positioning plates 31 to be attached, the counterweight mechanism crosses the position of the fixing rod 24 on the bent rod 2 and is close to the first counterweight block 21 to improve the clamping force of the molds 33 when the molds are assembled together with the first counterweight block 21, when the mold is opened, the motor 11 is started to drive the bidirectional gear pump inside the hydraulic oil cylinder 1 to rotate reversely, the telescopic rod 12 is driven to contract towards the inside of the hydraulic oil cylinder, the telescopic rod 12 drives the supporting plate 13 to synchronously move towards the direction of the hydraulic oil cylinder 1 in the contraction process of the telescopic rod 12, the supporting plate 13 synchronously drives the top of the bent rod 2 to move towards the direction of the hydraulic oil cylinder 1 in the movement process towards the direction of the hydraulic oil cylinder 1 in the direction of the hydraulic oil cylinder 1, meanwhile, the first counterweight block 21 sliding along the top end of the bent rod 2 slides towards the fixed rod 24 on the bent rod 2 along the direction far away from the fixed rod 24 relative to the fixed rod 24 on the bent rod 2, the counterweight mechanism is synchronously driven to move towards the direction crossing the position of the fixed rod 24 on the bent rod 2 and close to the positioning plate 31 in the downward movement process of the first counterweight block 21, when the counterweight mechanism slides to the position crossing the position of the fixed rod 24 on the bent rod 2 and close to the positioning plate 31, gravity is applied to the bottom of the bent rod 2, the cooperation accelerates the 2 bottoms of knee lever efficiency that resets, synchronous cooperation telescopic link 12 efficiency that resets.

As an embodiment of the present invention, the weight mechanism includes: the arc-shaped groove 27 is formed in the surface of one side, away from the positioning plate 31, of the bent rod 2;

the second balancing weight 23 is connected inside the arc-shaped groove 27 in a sliding manner, a pull rope 22 is fixedly connected to the surface of the top end of the second balancing weight 23, and one end, far away from the second balancing weight 23, of the pull rope 22 is fixedly connected with the first balancing weight 21;

when the device works, as shown in fig. 2, because the surface of the side of the bent rod 2 far from the positioning plate 31 is provided with the arc-shaped groove 27, the inside of the arc-shaped groove 27 is connected with the second balancing weight 23 in a sliding way, the first balancing weight 21 and the second balancing weight 23 are fixedly connected by using the pull rope 22, the supporting plate 13 extends towards one end far away from the hydraulic oil cylinder 1 along with the telescopic rod 12 to force the first balancing weight 21 at the top of the bent rod 2 to slide relative to the fixing rod 24 on the bent rod 2 along with the bent rod 2 in the direction far away from the fixing rod 24, so that the first balancing weight 21 synchronously drives the second balancing weight 23 to slide towards the top of the bent rod 2 through the pull rope 22, when the telescopic rod 12 extends towards one end far away from the hydraulic oil cylinder 1 to drive the supporting plate 13 to force the bottom of the bent rod 2 to drive the mold 33 on the opposite surface of the positioning plate 31 to be attached, the second balancing weight 23 passes over the position of the fixing rod 24 on the bent rod 2 and is close to the first balancing weight 21, the clamping force of the mold 33 during mold closing is improved by matching with the first balancing weight 21, when the mold is opened, the starting motor 11 drives the bidirectional gear pump inside the hydraulic oil cylinder 1 to rotate reversely, the telescopic rod 12 is driven to contract towards the hydraulic oil cylinder, the telescopic rod 12 drives the supporting plate 13 to synchronously move towards the hydraulic oil cylinder 1 during the contraction process, the supporting plate 13 drives the bent rod 2 to gradually reset towards the hydraulic oil cylinder 1 during the movement process, meanwhile, the first balancing weight 21 sliding along the top end of the bent rod 2 slides towards the direction close to the fixed rod 24 along the bent rod 2 relative to the fixed rod 24 on the bent rod 2, during the sliding process of the first balancing weight 21 towards the direction close to the fixed rod 24, the second balancing weight 23 slides downwards under the action of self gravity, when the second balancing weight 23 slides to the position crossing the fixed rod 24 on the bent rod 2 and close to the position of the positioning plate 31, the second balancing weight 23 applies gravity to the bottom of the bent rod 2, the cooperation accelerates the 2 bottoms of knee lever efficiency that resets, synchronous cooperation telescopic link 12 efficiency that resets.

As an embodiment of the present invention, the surface of the second balancing weight 23 contacting the arc-shaped groove 27 is coated with a PTFE coating;

the during operation, through being close to arc wall 27 end surface coating at second balancing weight 23 and having the PTFE coating, utilize the nonstick and highly lubricated characteristic of PTFE to can have the frictional force that reduces between second balancing weight 23 and the arc wall 27, improve second balancing weight 23 at the inside sliding property of arc wall 27, reduce the degree of wear of second balancing weight 23, prolong second balancing weight 23 and arc wall 27's life.

In one embodiment of the present invention, a reinforcing plate 26 is fixedly connected to a surface of the curved bar 2 on a side close to the telescopic bar 12, the reinforcing plate 26 is used for reinforcing the strength of the curved bar 2, two ends of the reinforcing plate 26 are respectively fixedly connected to two sides of the curved bar 2, and a middle portion of the reinforcing plate 26 does not contact the curved bar 2.

During operation, as shown in fig. 2, the surface fixed connection that is close to one side of the telescopic rod 12 at the bent rod 2 has the reinforcing plate 26, so that the supporting force of the bottom supporting positioning plate 31 and the mold 33 of the bent rod 2 can be effectively enhanced, the middle part of the bent rod 2 is prevented from being influenced by the thrust of the telescopic rod 12 for a long time, and the middle part of the bent rod 2 is prevented from cracking, thereby shortening the service life of the bent rod 2.

As an embodiment of the present invention, a rubber layer 32 is fixedly connected between the positioning plate 31 and the mold 33, and bolts on the surface of the positioning plate 31 penetrate through the rubber layer 32 to be fixedly connected with the mold 33;

during operation, as shown in fig. 1, the rubber layer 32 is fixedly connected between the positioning plate 31 and the mold 33, so that the mold 33 is effectively prevented from being worn due to direct contact between the mold 33 and the positioning plate 31, the probability of wear of the mold 33 can be reduced, and the service life of the mold 33 is prolonged.

The specific operation flow is as follows:

the hydraulic oil cylinder 1 is arranged on a bracket of the blow molding machine, the motor 11 is started, so that the motor 11 synchronously drives the bidirectional gear pump inside the hydraulic oil cylinder 1 to rotate, the bidirectional gear pump drives the hydraulic oil inside the hydraulic oil cylinder 1 to drive the telescopic rod 12 to extend towards one end far away from the hydraulic oil cylinder 1 in the rotating process, the telescopic rod 12 is forced to move towards the outside of the hydraulic oil cylinder 1 (according to the working principle of an electric hydraulic push rod), the telescopic rod 12 synchronously drives the supporting plate 13 to move in the moving process towards the outside of the hydraulic oil cylinder 1, one end of the bent rod 2 slides in the rectangular hole 131, when the telescopic rod 12 drives the supporting plate 13 to move towards one end far away from the hydraulic oil cylinder 1, the supporting plate 13 contacts with the bent rod 2 in the rectangular hole 131 and drives the top of the bent rod 2 to move towards the end far away from the hydraulic oil cylinder 1, the bottom of the bent rod 2 makes an oblique upward arc motion during the process that the top of the bent rod 2 moves towards the end far away from the hydraulic oil cylinder 1, namely, the bent rod 2, the fixed rod 24 and the first supporting rod 25 form a lever structure and start to move, the bottom of the bent rod 2 is connected with the positioning plate 31 through a connecting piece, so that the positioning plate 31 is driven to move along the horizontal direction by using the connecting piece in the process that the bottom of the bent rod 2 makes an upward oblique arc motion, because the die 33 is fixedly arranged on the surface of one end of the positioning plate 31 far away from the bent rod 2 through the bolt, the positioning plate 31 synchronously drives the die 33 to move in the moving process, through the symmetrical structure design of the positioning plate 31, as the telescopic rod 12 continuously extends to the end far away from the hydraulic oil cylinder 1, so that the telescopic rod 12 drives the supporting plate 13 to force the bottom of the curved rod 2 to push the positioning plate 31 and the mold 33 to move along the horizontal direction until the telescopic rod 12 is completely extended, and the molds 33 on the opposite surfaces of the two symmetrically designed positioning plates 31 are fully attached.

The telescopic rod 12 extends towards one end far away from the hydraulic oil cylinder 1 to drive the support plate 13 to force the top of the bent rod 2 to move synchronously, the bottom of the bent rod 2 makes an oblique upward arc motion in the oblique upward arc motion process to synchronously drive the sliding block 312 inside the sliding groove 311 to move upwards along the bottom of the sliding groove 311, because the bottom of the bent rod 2 makes an oblique upward arc motion, the sliding block 312 inside the sliding groove 311 drives the positioning plate 31 to move horizontally in the upward motion process inside the sliding groove 311, the positioning plate 31 synchronously drives the mold 33 on the surface of the positioning plate 31 to move in the moving process of the positioning plate 31, when the bottom of the bent rod 2 makes an oblique upward arc motion process, the sliding block 312 inside the sliding groove 311 is driven to move towards the top of the sliding groove 311 to force the positioning plate 31 to drive the mold 33 to move, the positioning plate 31 and the mold 33 can only move along the horizontal direction of the rail 3 by matching with the rail 3, until the telescopic rod 12 is completely extended, the sliding block 312 is positioned at the top of the sliding groove 311 at the top, and simultaneously, and the molds 33 on the opposite surfaces of the two positioning plates 31 designed symmetrically are fully attached.

The sliding friction is changed into rolling friction from sliding friction by rotatably connecting evenly arranged balls 313 on one end surface of the sliding block 312 close to the sliding chute 311.

When the telescopic rod 12 extends to one end far away from the hydraulic oil cylinder 1 to drive the support plate 13 to force the bottom of the bent rod 2 to drive the dies 33 on the opposite surfaces of the two positioning plates 31 to be attached, at the moment, the bent rod 2 takes the fixing rod 24 as a rotating shaft, the whole body is in an inclined state, the gravity center of the first balancing weight 21 is positioned on one side of the rotating shaft far away from the positioning plates 31, and by utilizing the lever principle, the weight of the top end of the bent rod 2 is increased, so that the force of the bottom end of the bent rod 2 driving the positioning plates 31 to move with the dies 33 is synchronously increased.

When telescopic link 12 extends to keeping away from hydraulic cylinder 1 one end and drives backup pad 13 and remove, backup pad 13 forces the curved bar 2 to remove the in-process along with telescopic link 12 is outwards extended, curved bar 2 atress and use dead lever 24 as the pivot, wholly be the slope form, along with curved bar 2 lasts atress and removal, make dead lever 24 on the relative curved bar 2 of first balancing weight 21 above backup pad 13 slide along curved bar 2 to the direction of keeping away from dead lever 24, thereby can effectively prolong the length of the arm of force that locating plate 31 one end was kept away from to dead lever 24 on the curved bar 2, and then utilize lever principle further to improve the power that the bottom of curved bar 2 drove locating plate 31 and mould 33 and removed.

The support plate 13 extends towards one end far away from the hydraulic oil cylinder 1 along with the telescopic rod 12 to force the fixed rod 24 on the first balancing weight 21 at the top of the bent rod 2 relative to the bent rod 2 to slide along the bent rod 2 towards the direction far away from the fixed rod 24, so that the first balancing weight 21 synchronously drives the second balancing weight 23 to slide towards the top of the bent rod 2 through the pull rope 22, when the telescopic rod 12 extends towards one end far away from the hydraulic oil cylinder 1 to drive the support plate 13 to force the bottom of the bent rod 2 to drive the positioning plate 31 to be attached to the mold 33 on the relative surface, the second balancing weight 23 crosses the position of the fixed rod 24 on the bent rod 2 and is close to the first balancing weight 21, the clamping force of the mold 33 during mold closing is improved by matching with the first balancing weight 21, when the mold is opened, the starting motor 11 drives the bidirectional gear pump inside the hydraulic oil cylinder 1 to reverse, the telescopic rod 12 is driven to shrink towards the inside of the hydraulic oil cylinder, the telescopic rod 12 drives the support plate 12 to synchronously move towards the direction of the hydraulic oil cylinder 1, the support plate 13 drives the bent rod 2 to gradually reset in the process of moving towards the direction of the hydraulic oil cylinder 1, meanwhile, the fixed rod 24 on the first balancing weight 21 relative to slide along the fixed rod 24 on the bent rod 2 along the direction of the bent rod 2 along the direction, when the second balancing weight 24, the fixed rod 23 slides towards the direction, and when the second balancing weight 23 slides towards the second balancing weight 23, and the fixed rod 23 slides towards the direction under the direction, and when the second balancing weight 23 slides towards the direction of the fixed rod 23, and exerts the fixed rod 23 under the gravity.

Through coating the surface of one end, close to the arc-shaped groove 27, of the second balancing weight 23 with a PTFE coating, the non-stick and high-lubrication characteristics of PTFE are utilized, so that the friction force between the second balancing weight 23 and the arc-shaped groove 27 can be reduced.

The reinforcing plate 26 is fixedly connected to the surface of the side, close to the telescopic rod 12, of the bent rod 2, so that the supporting force of the bottom supporting and positioning plate 31 and the die 33 of the bent rod 2 can be effectively enhanced.

Through fixedly connected with rubber layer 32 between locating plate 31 and mould 33, can effectively avoid mould 33 directly to lead to mould 33 to receive wearing and tearing with locating plate 31 contact.

The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A locking mechanism for die assembly of a blow molding machine comprises a hydraulic oil cylinder (1) and a positioning plate (31), wherein the positioning plate (31) is designed in a symmetrical structure and is positioned below the hydraulic oil cylinder (1), a die (33) is fixedly mounted on the positioning plate (31) through bolts, a bidirectional gear pump is mounted inside the hydraulic oil cylinder (1), a motor (11) is mounted above the hydraulic oil cylinder (1), telescopic rods (12) which are uniformly arranged are connected in side walls of the left end and the right end of the hydraulic oil cylinder (1) in a sealing and sliding mode, and the motor (11) is used for driving the bidirectional gear pump inside the hydraulic oil cylinder (1) to rotate so as to force hydraulic oil inside the hydraulic oil cylinder (1) to drive the telescopic rods (12) to stretch;

the locking mechanism further comprises: the supporting plate (13) is fixedly connected with one end, far away from the hydraulic oil cylinder (1), of the telescopic rod (12), and a rectangular hole (131) is formed in the middle of the supporting plate (13);

the bending rod (2) is of a 'T' -shaped structural design, one end of each bending rod (2) is slidably mounted in the rectangular hole (131), a round hole is formed in the middle of each bending rod (2), two bending rods (2) are symmetrically distributed on two sides of the positioning plate (31), two bending rods (2) are arranged in each group and are distributed in parallel, the same bending rod (2) is positioned on the same side of the die (33), a fixing rod (24) is rotatably connected between the bending rods (2) in each group through the round hole, the middle of the fixing rod (24) is fixedly connected to a first supporting rod (25), one end, far away from the fixing rod (24), of the first supporting rod (25) is fixedly connected with the hydraulic cylinder (1);

the connecting piece, the other end of knee (2) passes through the connecting piece with locating plate (31) are connected, the connecting piece is used for assisting knee (2) forces locating plate (31) to remove along the horizontal direction.

2. The locking mechanism for mold clamping of the blow molding machine according to claim 1, characterized in that: the connector includes:

the sliding groove (311) is formed in the surface, close to one end of the bent rod (2), of the positioning plate (31);

the sliding block (312) is connected to the inside of the sliding groove (311) in a sliding mode, and one end, protruding out of the sliding groove (311), of the sliding block (312) is hinged to the bottom end of the bent rod (2);

track (3), track (3) are located locating plate (31) bottom, track (3) with fixedly connected with second bracing piece (34) between dead lever (24), locating plate (31) with mould (33) are in track (3) surface slides, track (3) are used for assisting locating plate (31) with mould (33) remove along the horizontal direction.

3. The locking mechanism for mold clamping of the blow molding machine according to claim 2, characterized in that: the surface of one end, close to the sliding groove (311), of the sliding block (312) is rotatably connected with balls (313) which are uniformly arranged.

4. The locking mechanism for mold clamping of the blow molding machine according to claim 1, characterized in that: a first balancing weight (21) is installed at the top of the bent rod (2), and the first balancing weight (21) is used for enhancing the clamping force of the positioning plate (31) after the mold is closed.

5. The locking mechanism for mold clamping of the blow molding machine according to claim 4, wherein: the first balancing weight (21) is designed to be hollow, and the top of the bent rod (2) is connected to the inside of the first balancing weight (21) in a sliding mode.

6. The locking mechanism for mold clamping of the blow molding machine according to claim 5, wherein: the surface of one side, away from the positioning plate (31), of the bent rod (2) is connected with a counterweight mechanism in a sliding mode, and the counterweight mechanism is used for enhancing clamping force of the positioning plate (31) during mold closing.

7. The locking mechanism for mold clamping of the blow molding machine according to claim 6, wherein: the counterweight mechanism includes:

the arc-shaped groove (27) is formed in the surface of one side, away from the positioning plate (31), of the bent rod (2);

the second balancing weight (23) is connected to the inner portion of the arc-shaped groove (27) in a sliding mode, a pull rope (22) is fixedly connected to the surface of the top end of the second balancing weight (23), and one end, far away from the second balancing weight (23), of the pull rope (22) is fixedly connected with the first balancing weight (21).

8. The locking mechanism for mold clamping of the blow molding machine according to claim 7, wherein: the surface of the second balancing weight (23) which is in contact with the arc-shaped groove (27) is coated with a PTFE coating.

9. The locking mechanism for mold clamping of the blow molding machine according to claim 4, wherein: the utility model discloses a curved bar, including curved bar (2), telescopic link (12), reinforcing plate (26) are used for strengthening the intensity of curved bar (2), the both ends difference fixed connection of reinforcing plate (26) in both sides on curved bar (2), the middle part contactless of reinforcing plate (26) curved bar (2).

10. The locking mechanism for mold clamping of the blow molding machine according to claim 1, characterized in that: a rubber layer (32) is fixedly connected between the positioning plate (31) and the die (33), and bolts on the surface of the positioning plate (31) penetrate through the rubber layer (32) to be fixedly connected with the die (33).